External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-11-02 11:21:12 +00:00
Code Issues Packages Projects Releases Wiki Activity
e8400564c8
libvirt/src/nodeinfo.c
Roman Bogorodskiy 3b00df01fb BSD: implement nodeGetCPUStats 
Implementation obtains CPU usage information using
kern.cp_time and kern.cp_times sysctl(8)s and reports
CPU utilization.
2014-02-06 14:09:15 +01:00

1879 lines
50 KiB
C
Raw Blame History

/*
* nodeinfo.c: Helper routines for OS specific node information
*
* Copyright (C) 2006-2008, 2010-2013 Red Hat, Inc.
* Copyright (C) 2006 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <errno.h>
#include <dirent.h>
#include <sys/utsname.h>
#include <sched.h>
#include "conf/domain_conf.h"
#if defined(__FreeBSD__) || defined(__APPLE__)
# include <sys/time.h>
# include <sys/types.h>
# include <sys/sysctl.h>
# include <sys/resource.h>
#endif
#include "c-ctype.h"
#include "viralloc.h"
#include "nodeinfopriv.h"
#include "physmem.h"
#include "virlog.h"
#include "virerror.h"
#include "count-one-bits.h"
#include "intprops.h"
#include "virarch.h"
#include "virfile.h"
#include "virtypedparam.h"
#include "virstring.h"
#include "virnuma.h"
#define VIR_FROM_THIS VIR_FROM_NONE
#if defined(__FreeBSD__) || defined(__APPLE__)
static int
appleFreebsdNodeGetCPUCount(void)
{
int ncpu_mib[2] = { CTL_HW, HW_NCPU };
unsigned long ncpu;
size_t ncpu_len = sizeof(ncpu);
if (sysctl(ncpu_mib, 2, &ncpu, &ncpu_len, NULL, 0) == -1) {
virReportSystemError(errno, "%s", _("Cannot obtain CPU count"));
return -1;
}
return ncpu;
}
/* VIR_HW_PHYSMEM - the resulting value of HW_PHYSMEM of FreeBSD
* is 64 bits while that of Mac OS X is still 32 bits.
* Mac OS X provides HW_MEMSIZE for 64 bits version of HW_PHYSMEM
* since 10.6.8 (Snow Leopard) at least.
*/
# ifdef HW_MEMSIZE
# define VIR_HW_PHYSMEM HW_MEMSIZE
# else
# define VIR_HW_PHYSMEM HW_PHYSMEM
# endif
static int
appleFreebsdNodeGetMemorySize(unsigned long *memory)
{
int mib[2] = { CTL_HW, VIR_HW_PHYSMEM };
unsigned long physmem;
size_t len = sizeof(physmem);
if (sysctl(mib, 2, &physmem, &len, NULL, 0) == -1) {
virReportSystemError(errno, "%s", _("cannot obtain memory size"));
return -1;
}
*memory = (unsigned long)(physmem / 1024);
return 0;
}
#endif /* defined(__FreeBSD__) || defined(__APPLE__) */
#ifdef __FreeBSD__
# define BSD_CPU_STATS_ALL 4
# define BSD_MEMORY_STATS_ALL 4
# define TICK_TO_NSEC (1000ull * 1000ull * 1000ull / (stathz ? stathz : hz))
static int
freebsdNodeGetCPUStats(int cpuNum,
virNodeCPUStatsPtr params,
int *nparams)
{
const char *sysctl_name;
long *cpu_times;
struct clockinfo clkinfo;
size_t i, j, cpu_times_size, clkinfo_size;
int cpu_times_num, offset, hz, stathz, ret = -1;
struct field_cpu_map {
const char *field;
int idx[CPUSTATES];
} cpu_map[] = {
{VIR_NODE_CPU_STATS_KERNEL, {CP_SYS}},
{VIR_NODE_CPU_STATS_USER, {CP_USER, CP_NICE}},
{VIR_NODE_CPU_STATS_IDLE, {CP_IDLE}},
{VIR_NODE_CPU_STATS_INTR, {CP_INTR}},
{NULL, {0}}
};
if ((*nparams) == 0) {
*nparams = BSD_CPU_STATS_ALL;
return 0;
}
if ((*nparams) != BSD_CPU_STATS_ALL) {
virReportInvalidArg(*nparams,
_("nparams in %s must be equal to %d"),
__FUNCTION__, BSD_CPU_STATS_ALL);
return -1;
}
clkinfo_size = sizeof(clkinfo);
if (sysctlbyname("kern.clockrate", &clkinfo, &clkinfo_size, NULL, 0) < 0) {
virReportSystemError(errno,
_("sysctl failed for '%s'"),
"kern.clockrate");
return -1;
}
stathz = clkinfo.stathz;
hz = clkinfo.hz;
if (cpuNum == VIR_NODE_CPU_STATS_ALL_CPUS) {
sysctl_name = "kern.cp_time";
cpu_times_num = 1;
offset = 0;
} else {
sysctl_name = "kern.cp_times";
cpu_times_num = appleFreebsdNodeGetCPUCount();
if (cpuNum >= cpu_times_num) {
virReportInvalidArg(cpuNum,
_("Invalid cpuNum in %s"),
__FUNCTION__);
return -1;
}
offset = cpu_times_num * CPUSTATES;
}
cpu_times_size = sizeof(long) * cpu_times_num * CPUSTATES;
if (VIR_ALLOC_N(cpu_times, cpu_times_num * CPUSTATES) < 0)
goto cleanup;
if (sysctlbyname(sysctl_name, cpu_times, &cpu_times_size, NULL, 0) < 0) {
virReportSystemError(errno,
_("sysctl failed for '%s'"),
sysctl_name);
goto cleanup;
}
for (i = 0; cpu_map[i].field != NULL; i++) {
virNodeCPUStatsPtr param = &params[i];
if (virStrcpyStatic(param->field, cpu_map[i].field) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Field '%s' too long for destination"),
cpu_map[i].field);
goto cleanup;
}
param->value = 0;
for (j = 0; j < ARRAY_CARDINALITY(cpu_map[i].idx); j++)
param->value += cpu_times[offset + cpu_map[i].idx[j]] * TICK_TO_NSEC;
}
ret = 0;
cleanup:
VIR_FREE(cpu_times);
return ret;
}
static int
freebsdNodeGetMemoryStats(virNodeMemoryStatsPtr params,
int *nparams)
{
size_t i, j = 0;
unsigned long pagesize = getpagesize() >> 10;
long bufpages;
size_t bufpages_size = sizeof(bufpages);
struct field_sysctl_map {
const char *field;
const char *sysctl_name;
} sysctl_map[] = {
{VIR_NODE_MEMORY_STATS_TOTAL, "vm.stats.vm.v_page_count"},
{VIR_NODE_MEMORY_STATS_FREE, "vm.stats.vm.v_free_count"},
{VIR_NODE_MEMORY_STATS_CACHED, "vm.stats.vm.v_cache_count"},
{NULL, NULL}
};
if ((*nparams) == 0) {
*nparams = BSD_MEMORY_STATS_ALL;
return 0;
}
if ((*nparams) != BSD_MEMORY_STATS_ALL) {
virReportInvalidArg(nparams,
_("nparams in %s must be %d"),
__FUNCTION__, BSD_MEMORY_STATS_ALL);
return -1;
}
for (i = 0; sysctl_map[i].field != NULL; i++) {
u_int value;
size_t value_size = sizeof(value);
virNodeMemoryStatsPtr param;
if (sysctlbyname(sysctl_map[i].sysctl_name, &value,
&value_size, NULL, 0) < 0) {
virReportSystemError(errno,
_("sysctl failed for '%s'"),
sysctl_map[i].sysctl_name);
return -1;
}
param = &params[j++];
if (virStrcpyStatic(param->field, sysctl_map[i].field) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Field '%s' too long for destination"),
sysctl_map[i].field);
return -1;
}
param->value = (unsigned long long)value * pagesize;
}
{
virNodeMemoryStatsPtr param = &params[j++];
if (sysctlbyname("vfs.bufspace", &bufpages, &bufpages_size, NULL, 0) < 0) {
virReportSystemError(errno,
_("sysctl failed for '%s'"),
"vfs.bufspace");
return -1;
}
if (virStrcpyStatic(param->field, VIR_NODE_MEMORY_STATS_BUFFERS) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Field '%s' too long for destination"),
VIR_NODE_MEMORY_STATS_BUFFERS);
return -1;
}
param->value = (unsigned long long)bufpages >> 10;
}
return 0;
}
#endif /* __FreeBSD__ */
#ifdef __linux__
# define CPUINFO_PATH "/proc/cpuinfo"
# define SYSFS_SYSTEM_PATH "/sys/devices/system"
# define SYSFS_CPU_PATH SYSFS_SYSTEM_PATH"/cpu"
# define PROCSTAT_PATH "/proc/stat"
# define MEMINFO_PATH "/proc/meminfo"
# define SYSFS_MEMORY_SHARED_PATH "/sys/kernel/mm/ksm"
# define SYSFS_THREAD_SIBLINGS_LIST_LENGTH_MAX 1024
# define LINUX_NB_CPU_STATS 4
# define LINUX_NB_MEMORY_STATS_ALL 4
# define LINUX_NB_MEMORY_STATS_CELL 2
/* Return the positive decimal contents of the given
* DIR/cpu%u/FILE, or -1 on error. If DEFAULT_VALUE is non-negative
* and the file could not be found, return that instead of an error;
* this is useful for machines that cannot hot-unplug cpu0, or where
* hot-unplugging is disabled, or where the kernel is too old
* to support NUMA cells, etc. */
static int
virNodeGetCpuValue(const char *dir, unsigned int cpu, const char *file,
int default_value)
{
char *path;
FILE *pathfp;
int value = -1;
char value_str[INT_BUFSIZE_BOUND(value)];
char *tmp;
if (virAsprintf(&path, "%s/cpu%u/%s", dir, cpu, file) < 0)
return -1;
pathfp = fopen(path, "r");
if (pathfp == NULL) {
if (default_value >= 0 && errno == ENOENT)
value = default_value;
else
virReportSystemError(errno, _("cannot open %s"), path);
goto cleanup;
}
if (fgets(value_str, sizeof(value_str), pathfp) == NULL) {
virReportSystemError(errno, _("cannot read from %s"), path);
goto cleanup;
}
if (virStrToLong_i(value_str, &tmp, 10, &value) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("could not convert '%s' to an integer"),
value_str);
goto cleanup;
}
cleanup:
VIR_FORCE_FCLOSE(pathfp);
VIR_FREE(path);
return value;
}
static unsigned long
virNodeCountThreadSiblings(const char *dir, unsigned int cpu)
{
unsigned long ret = 0;
char *path;
FILE *pathfp;
char str[1024];
size_t i;
if (virAsprintf(&path, "%s/cpu%u/topology/thread_siblings",
dir, cpu) < 0)
return 0;
pathfp = fopen(path, "r");
if (pathfp == NULL) {
/* If file doesn't exist, then pretend our only
* sibling is ourself */
if (errno == ENOENT) {
VIR_FREE(path);
return 1;
}
virReportSystemError(errno, _("cannot open %s"), path);
VIR_FREE(path);
return 0;
}
if (fgets(str, sizeof(str), pathfp) == NULL) {
virReportSystemError(errno, _("cannot read from %s"), path);
goto cleanup;
}
i = 0;
while (str[i] != '\0') {
if (c_isdigit(str[i]))
ret += count_one_bits(str[i] - '0');
else if (str[i] >= 'A' && str[i] <= 'F')
ret += count_one_bits(str[i] - 'A' + 10);
else if (str[i] >= 'a' && str[i] <= 'f')
ret += count_one_bits(str[i] - 'a' + 10);
i++;
}
cleanup:
VIR_FORCE_FCLOSE(pathfp);
VIR_FREE(path);
return ret;
}
static int
virNodeParseSocket(const char *dir, unsigned int cpu)
{
int ret = virNodeGetCpuValue(dir, cpu, "topology/physical_package_id",
0);
# if defined(__powerpc__) || \
defined(__powerpc64__) || \
defined(__s390__) || \
defined(__s390x__) || \
defined(__aarch64__)
/* ppc and s390(x) has -1 */
if (ret < 0)
ret = 0;
# endif
return ret;
}
# ifndef CPU_COUNT
static int
CPU_COUNT(cpu_set_t *set)
{
size_t i, count = 0;
for (i = 0; i < CPU_SETSIZE; i++)
if (CPU_ISSET(i, set))
count++;
return count;
}
# endif /* !CPU_COUNT */
/* parses a node entry, returning number of processors in the node and
* filling arguments */
static int
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4)
ATTRIBUTE_NONNULL(5)
virNodeParseNode(const char *node,
int *sockets,
int *cores,
int *threads,
int *offline)
{
int ret = -1;
int processors = 0;
DIR *cpudir = NULL;
struct dirent *cpudirent = NULL;
int sock_max = 0;
cpu_set_t sock_map;
int sock;
cpu_set_t *core_maps = NULL;
int core;
size_t i;
int siblings;
unsigned int cpu;
int online;
*threads = 0;
*cores = 0;
*sockets = 0;
if (!(cpudir = opendir(node))) {
virReportSystemError(errno, _("cannot opendir %s"), node);
goto cleanup;
}
/* enumerate sockets in the node */
CPU_ZERO(&sock_map);
errno = 0;
while ((cpudirent = readdir(cpudir))) {
if (sscanf(cpudirent->d_name, "cpu%u", &cpu) != 1)
continue;
if ((online = virNodeGetCpuValue(node, cpu, "online", 1)) < 0)
goto cleanup;
if (!online)
continue;
/* Parse socket */
if ((sock = virNodeParseSocket(node, cpu)) < 0)
goto cleanup;
CPU_SET(sock, &sock_map);
if (sock > sock_max)
sock_max = sock;
errno = 0;
}
if (errno) {
virReportSystemError(errno, _("problem reading %s"), node);
goto cleanup;
}
sock_max++;
/* allocate cpu maps for each socket */
if (VIR_ALLOC_N(core_maps, sock_max) < 0)
goto cleanup;
for (i = 0; i < sock_max; i++)
CPU_ZERO(&core_maps[i]);
/* iterate over all CPU's in the node */
rewinddir(cpudir);
errno = 0;
while ((cpudirent = readdir(cpudir))) {
if (sscanf(cpudirent->d_name, "cpu%u", &cpu) != 1)
continue;
if ((online = virNodeGetCpuValue(node, cpu, "online", 1)) < 0)
goto cleanup;
if (!online) {
(*offline)++;
continue;
}
processors++;
/* Parse socket */
if ((sock = virNodeParseSocket(node, cpu)) < 0)
goto cleanup;
if (!CPU_ISSET(sock, &sock_map)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("CPU socket topology has changed"));
goto cleanup;
}
/* Parse core */
# if defined(__s390__) || \
defined(__s390x__)
/* logical cpu is equivalent to a core on s390 */
core = cpu;
# else
core = virNodeGetCpuValue(node, cpu, "topology/core_id", 0);
# endif
CPU_SET(core, &core_maps[sock]);
if (!(siblings = virNodeCountThreadSiblings(node, cpu)))
goto cleanup;
if (siblings > *threads)
*threads = siblings;
errno = 0;
}
if (errno) {
virReportSystemError(errno, _("problem reading %s"), node);
goto cleanup;
}
/* finalize the returned data */
*sockets = CPU_COUNT(&sock_map);
for (i = 0; i < sock_max; i++) {
if (!CPU_ISSET(i, &sock_map))
continue;
core = CPU_COUNT(&core_maps[i]);
if (core > *cores)
*cores = core;
}
ret = processors;
cleanup:
/* don't shadow a more serious error */
if (cpudir && closedir(cpudir) < 0 && ret >= 0) {
virReportSystemError(errno, _("problem closing %s"), node);
ret = -1;
}
VIR_FREE(core_maps);
return ret;
}
int linuxNodeInfoCPUPopulate(FILE *cpuinfo,
const char *sysfs_dir,
virNodeInfoPtr nodeinfo)
{
char line[1024];
DIR *nodedir = NULL;
struct dirent *nodedirent = NULL;
int cpus, cores, socks, threads, offline = 0;
unsigned int node;
int ret = -1;
char *sysfs_nodedir = NULL;
char *sysfs_cpudir = NULL;
/* Start with parsing CPU clock speed from /proc/cpuinfo */
while (fgets(line, sizeof(line), cpuinfo) != NULL) {
# if defined(__x86_64__) || \
defined(__amd64__) || \
defined(__i386__)
char *buf = line;
if (STRPREFIX(buf, "cpu MHz")) {
char *p;
unsigned int ui;
buf += 7;
while (*buf && c_isspace(*buf))
buf++;
if (*buf != ':' || !buf[1]) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("parsing cpu MHz from cpuinfo"));
goto cleanup;
}
if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0 &&
/* Accept trailing fractional part. */
(*p == '\0' || *p == '.' || c_isspace(*p)))
nodeinfo->mhz = ui;
}
# elif defined(__powerpc__) || \
defined(__powerpc64__)
char *buf = line;
if (STRPREFIX(buf, "clock")) {
char *p;
unsigned int ui;
buf += 5;
while (*buf && c_isspace(*buf))
buf++;
if (*buf != ':' || !buf[1]) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("parsing cpu MHz from cpuinfo"));
goto cleanup;
}
if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0 &&
/* Accept trailing fractional part. */
(*p == '\0' || *p == '.' || c_isspace(*p)))
nodeinfo->mhz = ui;
/* No other interesting infos are available in /proc/cpuinfo.
* However, there is a line identifying processor's version,
* identification and machine, but we don't want it to be caught
* and parsed in next iteration, because it is not in expected
* format and thus lead to error. */
}
# elif defined(__arm__) || defined(__aarch64__)
char *buf = line;
if (STRPREFIX(buf, "BogoMIPS")) {
char *p;
unsigned int ui;
buf += 8;
while (*buf && c_isspace(*buf))
buf++;
if (*buf != ':' || !buf[1]) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("parsing cpu MHz from cpuinfo"));
goto cleanup;
}
if (virStrToLong_ui(buf+1, &p, 10, &ui) == 0
/* Accept trailing fractional part. */
&& (*p == '\0' || *p == '.' || c_isspace(*p)))
nodeinfo->mhz = ui;
}
# elif defined(__s390__) || \
defined(__s390x__)
/* s390x has no realistic value for CPU speed,
* assign a value of zero to signify this */
nodeinfo->mhz = 0;
# else
# warning Parser for /proc/cpuinfo needs to be adapted for your architecture
# endif
}
/* OK, we've parsed clock speed out of /proc/cpuinfo. Get the
* core, node, socket, thread and topology information from /sys
*/
if (virAsprintf(&sysfs_nodedir, "%s/node", sysfs_dir) < 0)
goto cleanup;
if (!(nodedir = opendir(sysfs_nodedir))) {
/* the host isn't probably running a NUMA architecture */
goto fallback;
}
errno = 0;
while ((nodedirent = readdir(nodedir))) {
if (sscanf(nodedirent->d_name, "node%u", &node) != 1)
continue;
nodeinfo->nodes++;
if (virAsprintf(&sysfs_cpudir, "%s/node/%s",
sysfs_dir, nodedirent->d_name) < 0)
goto cleanup;
if ((cpus = virNodeParseNode(sysfs_cpudir, &socks, &cores,
&threads, &offline)) < 0)
goto cleanup;
VIR_FREE(sysfs_cpudir);
nodeinfo->cpus += cpus;
if (socks > nodeinfo->sockets)
nodeinfo->sockets = socks;
if (cores > nodeinfo->cores)
nodeinfo->cores = cores;
if (threads > nodeinfo->threads)
nodeinfo->threads = threads;
errno = 0;
}
if (errno) {
virReportSystemError(errno, _("problem reading %s"), sysfs_nodedir);
goto cleanup;
}
if (nodeinfo->cpus && nodeinfo->nodes)
goto done;
fallback:
VIR_FREE(sysfs_cpudir);
if (virAsprintf(&sysfs_cpudir, "%s/cpu", sysfs_dir) < 0)
goto cleanup;
if ((cpus = virNodeParseNode(sysfs_cpudir, &socks, &cores,
&threads, &offline)) < 0)
goto cleanup;
nodeinfo->nodes = 1;
nodeinfo->cpus = cpus;
nodeinfo->sockets = socks;
nodeinfo->cores = cores;
nodeinfo->threads = threads;
done:
/* There should always be at least one cpu, socket, node, and thread. */
if (nodeinfo->cpus == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no CPUs found"));
goto cleanup;
}
if (nodeinfo->sockets == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no sockets found"));
goto cleanup;
}
if (nodeinfo->threads == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("no threads found"));
goto cleanup;
}
/* Now check if the topology makes sense. There are machines that don't
* expose their real number of nodes or for example the AMD Bulldozer
* architecture that exposes their Clustered integer core modules as both
* threads and cores. This approach throws off our detection. Unfortunately
* the nodeinfo structure isn't designed to carry the full topology so
* we're going to lie about the detected topology to notify the user
* to check the host capabilities for the actual topology. */
if ((nodeinfo->nodes *
nodeinfo->sockets *
nodeinfo->cores *
nodeinfo->threads) != (nodeinfo->cpus + offline)) {
nodeinfo->nodes = 1;
nodeinfo->sockets = 1;
nodeinfo->cores = nodeinfo->cpus + offline;
nodeinfo->threads = 1;
}
ret = 0;
cleanup:
/* don't shadow a more serious error */
if (nodedir && closedir(nodedir) < 0 && ret >= 0) {
virReportSystemError(errno, _("problem closing %s"), sysfs_nodedir);
ret = -1;
}
VIR_FREE(sysfs_nodedir);
VIR_FREE(sysfs_cpudir);
return ret;
}
static int
virNodeCPUStatsAssign(virNodeCPUStatsPtr param,
const char *name,
unsigned long long value)
{
if (virStrcpyStatic(param->field, name) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("kernel cpu time field is too long"
" for the destination"));
return -1;
}
param->value = value;
return 0;
}
# define TICK_TO_NSEC (1000ull * 1000ull * 1000ull / sysconf(_SC_CLK_TCK))
int
linuxNodeGetCPUStats(FILE *procstat,
int cpuNum,
virNodeCPUStatsPtr params,
int *nparams)
{
int ret = -1;
char line[1024];
unsigned long long usr, ni, sys, idle, iowait;
unsigned long long irq, softirq, steal, guest, guest_nice;
char cpu_header[4 + INT_BUFSIZE_BOUND(cpuNum)];
if ((*nparams) == 0) {
/* Current number of cpu stats supported by linux */
*nparams = LINUX_NB_CPU_STATS;
ret = 0;
goto cleanup;
}
if ((*nparams) != LINUX_NB_CPU_STATS) {
virReportInvalidArg(*nparams,
_("nparams in %s must be equal to %d"),
__FUNCTION__, LINUX_NB_CPU_STATS);
goto cleanup;
}
if (cpuNum == VIR_NODE_CPU_STATS_ALL_CPUS) {
strcpy(cpu_header, "cpu ");
} else {
snprintf(cpu_header, sizeof(cpu_header), "cpu%d ", cpuNum);
}
while (fgets(line, sizeof(line), procstat) != NULL) {
char *buf = line;
if (STRPREFIX(buf, cpu_header)) { /* aka logical CPU time */
if (sscanf(buf,
"%*s %llu %llu %llu %llu %llu" // user ~ iowait
"%llu %llu %llu %llu %llu", // irq ~ guest_nice
&usr, &ni, &sys, &idle, &iowait,
&irq, &softirq, &steal, &guest, &guest_nice) < 4) {
continue;
}
if (virNodeCPUStatsAssign(&params[0], VIR_NODE_CPU_STATS_KERNEL,
(sys + irq + softirq) * TICK_TO_NSEC) < 0)
goto cleanup;
if (virNodeCPUStatsAssign(&params[1], VIR_NODE_CPU_STATS_USER,
(usr + ni) * TICK_TO_NSEC) < 0)
goto cleanup;
if (virNodeCPUStatsAssign(&params[2], VIR_NODE_CPU_STATS_IDLE,
idle * TICK_TO_NSEC) < 0)
goto cleanup;
if (virNodeCPUStatsAssign(&params[3], VIR_NODE_CPU_STATS_IOWAIT,
iowait * TICK_TO_NSEC) < 0)
goto cleanup;
ret = 0;
goto cleanup;
}
}
virReportInvalidArg(cpuNum,
_("Invalid cpuNum in %s"),
__FUNCTION__);
cleanup:
return ret;
}
static int
linuxNodeGetMemoryStats(FILE *meminfo,
int cellNum,
virNodeMemoryStatsPtr params,
int *nparams)
{
int ret = -1;
size_t i = 0, j = 0, k = 0;
int found = 0;
int nr_param;
char line[1024];
char meminfo_hdr[VIR_NODE_MEMORY_STATS_FIELD_LENGTH];
unsigned long val;
struct field_conv {
const char *meminfo_hdr; // meminfo header
const char *field; // MemoryStats field name
} field_conv[] = {
{"MemTotal:", VIR_NODE_MEMORY_STATS_TOTAL},
{"MemFree:", VIR_NODE_MEMORY_STATS_FREE},
{"Buffers:", VIR_NODE_MEMORY_STATS_BUFFERS},
{"Cached:", VIR_NODE_MEMORY_STATS_CACHED},
{NULL, NULL}
};
if (cellNum == VIR_NODE_MEMORY_STATS_ALL_CELLS) {
nr_param = LINUX_NB_MEMORY_STATS_ALL;
} else {
nr_param = LINUX_NB_MEMORY_STATS_CELL;
}
if ((*nparams) == 0) {
/* Current number of memory stats supported by linux */
*nparams = nr_param;
ret = 0;
goto cleanup;
}
if ((*nparams) != nr_param) {
virReportInvalidArg(nparams,
_("nparams in %s must be %d"),
__FUNCTION__, nr_param);
goto cleanup;
}
while (fgets(line, sizeof(line), meminfo) != NULL) {
char *buf = line;
if (STRPREFIX(buf, "Node ")) {
/*
* /sys/devices/system/node/nodeX/meminfo format is below.
* So, skip prefix "Node XX ".
*
* Node 0 MemTotal: 8386980 kB
* Node 0 MemFree: 5300920 kB
* :
*/
char *p;
p = buf;
for (i = 0; i < 2; i++) {
p = strchr(p, ' ');
if (p == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no prefix found"));
goto cleanup;
}
p++;
}
buf = p;
}
if (sscanf(buf, "%s %lu kB", meminfo_hdr, &val) < 2)
continue;
for (j = 0; field_conv[j].meminfo_hdr != NULL; j++) {
struct field_conv *convp = &field_conv[j];
if (STREQ(meminfo_hdr, convp->meminfo_hdr)) {
virNodeMemoryStatsPtr param = &params[k++];
if (virStrcpyStatic(param->field, convp->field) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Field kernel memory too long for destination"));
goto cleanup;
}
param->value = val;
found++;
break;
}
}
if (found >= nr_param)
break;
}
if (found == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no available memory line found"));
goto cleanup;
}
ret = 0;
cleanup:
return ret;
}
/* Determine the maximum cpu id from a Linux sysfs cpu/present file. */
static int
linuxParseCPUmax(const char *path)
{
char *str = NULL;
char *tmp;
int ret = -1;
if (virFileReadAll(path, 5 * VIR_DOMAIN_CPUMASK_LEN, &str) < 0)
goto cleanup;
tmp = str;
do {
if (virStrToLong_i(tmp, &tmp, 10, &ret) < 0 ||
!strchr(",-\n", *tmp)) {
virReportError(VIR_ERR_NO_SUPPORT,
_("failed to parse %s"), path);
ret = -1;
goto cleanup;
}
} while (*tmp++ != '\n');
ret++;
cleanup:
VIR_FREE(str);
return ret;
}
/*
* Linux maintains cpu bit map under cpu/online. For example, if
* cpuid=5's flag is not set and max cpu is 7, the map file shows
* 0-4,6-7. This function parses it and returns cpumap.
*/
static virBitmapPtr
linuxParseCPUmap(int max_cpuid, const char *path)
{
virBitmapPtr map = NULL;
char *str = NULL;
if (virFileReadAll(path, 5 * VIR_DOMAIN_CPUMASK_LEN, &str) < 0)
goto error;
if (virBitmapParse(str, 0, &map, max_cpuid) < 0)
goto error;
VIR_FREE(str);
return map;
error:
VIR_FREE(str);
virBitmapFree(map);
return NULL;
}
static virBitmapPtr
virNodeGetSiblingsList(const char *dir, int cpu_id)
{
char *path = NULL;
char *buf = NULL;
virBitmapPtr ret = NULL;
if (virAsprintf(&path, "%s/cpu%u/topology/thread_siblings_list",
dir, cpu_id) < 0)
goto cleanup;
if (virFileReadAll(path, SYSFS_THREAD_SIBLINGS_LIST_LENGTH_MAX, &buf) < 0)
goto cleanup;
if (virBitmapParse(buf, 0, &ret, virNumaGetMaxCPUs()) < 0)
goto cleanup;
cleanup:
VIR_FREE(buf);
VIR_FREE(path);
return ret;
}
#endif
int nodeGetInfo(virNodeInfoPtr nodeinfo)
{
virArch hostarch = virArchFromHost();
memset(nodeinfo, 0, sizeof(*nodeinfo));
if (virStrcpyStatic(nodeinfo->model, virArchToString(hostarch)) == NULL)
return -1;
#ifdef __linux__
{
int ret = -1;
FILE *cpuinfo = fopen(CPUINFO_PATH, "r");
if (!cpuinfo) {
virReportSystemError(errno,
_("cannot open %s"), CPUINFO_PATH);
return -1;
}
ret = linuxNodeInfoCPUPopulate(cpuinfo, SYSFS_SYSTEM_PATH, nodeinfo);
if (ret < 0)
goto cleanup;
/* Convert to KB. */
nodeinfo->memory = physmem_total() / 1024;
cleanup:
VIR_FORCE_FCLOSE(cpuinfo);
return ret;
}
#elif defined(__FreeBSD__) || defined(__APPLE__)
{
nodeinfo->nodes = 1;
nodeinfo->sockets = 1;
nodeinfo->threads = 1;
nodeinfo->cpus = appleFreebsdNodeGetCPUCount();
if (nodeinfo->cpus == -1)
return -1;
nodeinfo->cores = nodeinfo->cpus;
unsigned long cpu_freq;
size_t cpu_freq_len = sizeof(cpu_freq);
# ifdef __FreeBSD__
if (sysctlbyname("dev.cpu.0.freq", &cpu_freq, &cpu_freq_len, NULL, 0) < 0) {
virReportSystemError(errno, "%s", _("cannot obtain CPU freq"));
return -1;
}
nodeinfo->mhz = cpu_freq;
# else
if (sysctlbyname("hw.cpufrequency", &cpu_freq, &cpu_freq_len, NULL, 0) < 0) {
virReportSystemError(errno, "%s", _("cannot obtain CPU freq"));
return -1;
}
nodeinfo->mhz = cpu_freq / 1000000;
# endif
if (appleFreebsdNodeGetMemorySize(&nodeinfo->memory) < 0)
return -1;
return 0;
}
#else
/* XXX Solaris will need an impl later if they port QEMU driver */
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("node info not implemented on this platform"));
return -1;
#endif
}
int nodeGetCPUStats(int cpuNum ATTRIBUTE_UNUSED,
virNodeCPUStatsPtr params ATTRIBUTE_UNUSED,
int *nparams ATTRIBUTE_UNUSED,
unsigned int flags)
{
virCheckFlags(0, -1);
#ifdef __linux__
{
int ret;
FILE *procstat = fopen(PROCSTAT_PATH, "r");
if (!procstat) {
virReportSystemError(errno,
_("cannot open %s"), PROCSTAT_PATH);
return -1;
}
ret = linuxNodeGetCPUStats(procstat, cpuNum, params, nparams);
VIR_FORCE_FCLOSE(procstat);
return ret;
}
#elif defined(__FreeBSD__)
return freebsdNodeGetCPUStats(cpuNum, params, nparams);
#else
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("node CPU stats not implemented on this platform"));
return -1;
#endif
}
int nodeGetMemoryStats(int cellNum ATTRIBUTE_UNUSED,
virNodeMemoryStatsPtr params ATTRIBUTE_UNUSED,
int *nparams ATTRIBUTE_UNUSED,
unsigned int flags)
{
virCheckFlags(0, -1);
#ifdef __linux__
{
int ret;
char *meminfo_path = NULL;
FILE *meminfo;
int max_node;
if (cellNum == VIR_NODE_MEMORY_STATS_ALL_CELLS) {
if (VIR_STRDUP(meminfo_path, MEMINFO_PATH) < 0)
return -1;
} else {
if ((max_node = virNumaGetMaxNode()) < 0)
return -1;
if (cellNum > max_node) {
virReportInvalidArg(cellNum,
_("cellNum in %s must be less than or equal to %d"),
__FUNCTION__, max_node);
return -1;
}
if (virAsprintf(&meminfo_path, "%s/node/node%d/meminfo",
SYSFS_SYSTEM_PATH, cellNum) < 0)
return -1;
}
meminfo = fopen(meminfo_path, "r");
if (!meminfo) {
virReportSystemError(errno,
_("cannot open %s"), meminfo_path);
VIR_FREE(meminfo_path);
return -1;
}
ret = linuxNodeGetMemoryStats(meminfo, cellNum, params, nparams);
VIR_FORCE_FCLOSE(meminfo);
VIR_FREE(meminfo_path);
return ret;
}
#elif defined(__FreeBSD__)
return freebsdNodeGetMemoryStats(params, nparams);
#else
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("node memory stats not implemented on this platform"));
return -1;
#endif
}
int
nodeGetCPUCount(void)
{
#if defined(__linux__)
/* To support older kernels that lack cpu/present, such as 2.6.18
* in RHEL5, we fall back to count cpu/cpuNN entries; this assumes
* that such kernels also lack hotplug, and therefore cpu/cpuNN
* will be consecutive.
*/
char *cpupath = NULL;
int ncpu;
if (virFileExists(SYSFS_SYSTEM_PATH "/cpu/present")) {
ncpu = linuxParseCPUmax(SYSFS_SYSTEM_PATH "/cpu/present");
} else if (virFileExists(SYSFS_SYSTEM_PATH "/cpu/cpu0")) {
ncpu = 0;
do {
ncpu++;
VIR_FREE(cpupath);
if (virAsprintf(&cpupath, "%s/cpu/cpu%d",
SYSFS_SYSTEM_PATH, ncpu) < 0)
return -1;
} while (virFileExists(cpupath));
} else {
/* no cpu/cpu0: we give up */
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("host cpu counting not supported on this node"));
return -1;
}
VIR_FREE(cpupath);
return ncpu;
#elif defined(__FreeBSD__) || defined(__APPLE__)
return appleFreebsdNodeGetCPUCount();
#else
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("host cpu counting not implemented on this platform"));
return -1;
#endif
}
virBitmapPtr
nodeGetCPUBitmap(int *max_id ATTRIBUTE_UNUSED)
{
#ifdef __linux__
virBitmapPtr cpumap;
int present;
present = nodeGetCPUCount();
if (present < 0)
return NULL;
if (virFileExists(SYSFS_SYSTEM_PATH "/cpu/online")) {
cpumap = linuxParseCPUmap(present, SYSFS_SYSTEM_PATH "/cpu/online");
} else {
size_t i;
cpumap = virBitmapNew(present);
if (!cpumap)
return NULL;
for (i = 0; i < present; i++) {
int online = virNodeGetCpuValue(SYSFS_SYSTEM_PATH, i, "online", 1);
if (online < 0) {
virBitmapFree(cpumap);
return NULL;
}
if (online)
ignore_value(virBitmapSetBit(cpumap, i));
}
}
if (max_id && cpumap)
*max_id = present;
return cpumap;
#else
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("node cpumap not implemented on this platform"));
return NULL;
#endif
}
#ifdef __linux__
static int
nodeSetMemoryParameterValue(virTypedParameterPtr param)
{
char *path = NULL;
char *strval = NULL;
int ret = -1;
int rc = -1;
char *field = strchr(param->field, '_');
sa_assert(field);
field++;
if (virAsprintf(&path, "%s/%s",
SYSFS_MEMORY_SHARED_PATH, field) < 0) {
ret = -2;
goto cleanup;
}
if (virAsprintf(&strval, "%u", param->value.ui) == -1) {
ret = -2;
goto cleanup;
}
if ((rc = virFileWriteStr(path, strval, 0)) < 0) {
virReportSystemError(-rc, _("failed to set %s"), param->field);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(path);
VIR_FREE(strval);
return ret;
}
static bool
nodeMemoryParametersIsAllSupported(virTypedParameterPtr params,
int nparams)
{
char *path = NULL;
size_t i;
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
char *field = strchr(param->field, '_');
sa_assert(field);
field++;
if (virAsprintf(&path, "%s/%s",
SYSFS_MEMORY_SHARED_PATH, field) < 0)
return false;
if (!virFileExists(path)) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("Parameter '%s' is not supported by "
"this kernel"), param->field);
VIR_FREE(path);
return false;
}
VIR_FREE(path);
}
return true;
}
#endif
int
nodeSetMemoryParameters(virTypedParameterPtr params ATTRIBUTE_UNUSED,
int nparams ATTRIBUTE_UNUSED,
unsigned int flags)
{
virCheckFlags(0, -1);
#ifdef __linux__
size_t i;
int rc;
if (virTypedParamsValidate(params, nparams,
VIR_NODE_MEMORY_SHARED_PAGES_TO_SCAN,
VIR_TYPED_PARAM_UINT,
VIR_NODE_MEMORY_SHARED_SLEEP_MILLISECS,
VIR_TYPED_PARAM_UINT,
VIR_NODE_MEMORY_SHARED_MERGE_ACROSS_NODES,
VIR_TYPED_PARAM_UINT,
NULL) < 0)
return -1;
if (!nodeMemoryParametersIsAllSupported(params, nparams))
return -1;
for (i = 0; i < nparams; i++) {
rc = nodeSetMemoryParameterValue(&params[i]);
/* Out of memory */
if (rc == -2)
return -1;
}
return 0;
#else
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("node set memory parameters not implemented"
" on this platform"));
return -1;
#endif
}
#ifdef __linux__
static int
nodeGetMemoryParameterValue(const char *field,
void *value)
{
char *path = NULL;
char *buf = NULL;
char *tmp = NULL;
int ret = -1;
int rc = -1;
if (virAsprintf(&path, "%s/%s",
SYSFS_MEMORY_SHARED_PATH, field) < 0)
goto cleanup;
if (!virFileExists(path)) {
ret = -2;
goto cleanup;
}
if (virFileReadAll(path, 1024, &buf) < 0)
goto cleanup;
if ((tmp = strchr(buf, '\n')))
*tmp = '\0';
if (STREQ(field, "pages_to_scan") ||
STREQ(field, "sleep_millisecs") ||
STREQ(field, "merge_across_nodes"))
rc = virStrToLong_ui(buf, NULL, 10, (unsigned int *)value);
else if (STREQ(field, "pages_shared") ||
STREQ(field, "pages_sharing") ||
STREQ(field, "pages_unshared") ||
STREQ(field, "pages_volatile") ||
STREQ(field, "full_scans"))
rc = virStrToLong_ull(buf, NULL, 10, (unsigned long long *)value);
if (rc < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("failed to parse %s"), field);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(path);
VIR_FREE(buf);
return ret;
}
#endif
#define NODE_MEMORY_PARAMETERS_NUM 8
int
nodeGetMemoryParameters(virTypedParameterPtr params ATTRIBUTE_UNUSED,
int *nparams ATTRIBUTE_UNUSED,
unsigned int flags)
{
virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
#ifdef __linux__
unsigned int pages_to_scan;
unsigned int sleep_millisecs;
unsigned int merge_across_nodes;
unsigned long long pages_shared;
unsigned long long pages_sharing;
unsigned long long pages_unshared;
unsigned long long pages_volatile;
unsigned long long full_scans = 0;
size_t i;
int ret;
if ((*nparams) == 0) {
*nparams = NODE_MEMORY_PARAMETERS_NUM;
return 0;
}
for (i = 0; i < *nparams && i < NODE_MEMORY_PARAMETERS_NUM; i++) {
virTypedParameterPtr param = &params[i];
switch (i) {
case 0:
ret = nodeGetMemoryParameterValue("pages_to_scan", &pages_to_scan);
if (ret == -2)
continue;
else if (ret == -1)
return -1;
if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_TO_SCAN,
VIR_TYPED_PARAM_UINT, pages_to_scan) < 0)
return -1;
break;
case 1:
ret = nodeGetMemoryParameterValue("sleep_millisecs", &sleep_millisecs);
if (ret == -2)
continue;
else if (ret == -1)
return -1;
if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_SLEEP_MILLISECS,
VIR_TYPED_PARAM_UINT, sleep_millisecs) < 0)
return -1;
break;
case 2:
ret = nodeGetMemoryParameterValue("pages_shared", &pages_shared);
if (ret == -2)
continue;
else if (ret == -1)
return -1;
if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_SHARED,
VIR_TYPED_PARAM_ULLONG, pages_shared) < 0)
return -1;
break;
case 3:
ret = nodeGetMemoryParameterValue("pages_sharing", &pages_sharing);
if (ret == -2)
continue;
else if (ret == -1)
return -1;
if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_SHARING,
VIR_TYPED_PARAM_ULLONG, pages_sharing) < 0)
return -1;
break;
case 4:
ret = nodeGetMemoryParameterValue("pages_unshared", &pages_unshared);
if (ret == -2)
continue;
else if (ret == -1)
return -1;
if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_UNSHARED,
VIR_TYPED_PARAM_ULLONG, pages_unshared) < 0)
return -1;
break;
case 5:
ret = nodeGetMemoryParameterValue("pages_volatile", &pages_volatile);
if (ret == -2)
continue;
else if (ret == -1)
return -1;
if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_PAGES_VOLATILE,
VIR_TYPED_PARAM_ULLONG, pages_volatile) < 0)
return -1;
break;
case 6:
ret = nodeGetMemoryParameterValue("full_scans", &full_scans);
if (ret == -2)
continue;
else if (ret == -1)
return -1;
if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_FULL_SCANS,
VIR_TYPED_PARAM_ULLONG, full_scans) < 0)
return -1;
break;
case 7:
ret = nodeGetMemoryParameterValue("merge_across_nodes", &merge_across_nodes);
if (ret == -2)
continue;
else if (ret == -1)
return -1;
if (virTypedParameterAssign(param, VIR_NODE_MEMORY_SHARED_MERGE_ACROSS_NODES,
VIR_TYPED_PARAM_UINT, merge_across_nodes) < 0)
return -1;
break;
}
}
return 0;
#else
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("node get memory parameters not implemented"
" on this platform"));
return -1;
#endif
}
int
nodeGetCPUMap(unsigned char **cpumap,
unsigned int *online,
unsigned int flags)
{
virBitmapPtr cpus = NULL;
int maxpresent;
int ret = -1;
int dummy;
virCheckFlags(0, -1);
if (!cpumap && !online)
return nodeGetCPUCount();
if (!(cpus = nodeGetCPUBitmap(&maxpresent)))
goto cleanup;
if (cpumap && virBitmapToData(cpus, cpumap, &dummy) < 0)
goto cleanup;
if (online)
*online = virBitmapCountBits(cpus);
ret = maxpresent;
cleanup:
if (ret < 0 && cpumap)
VIR_FREE(*cpumap);
virBitmapFree(cpus);
return ret;
}
static int
nodeCapsInitNUMAFake(virCapsPtr caps ATTRIBUTE_UNUSED)
{
virNodeInfo nodeinfo;
virCapsHostNUMACellCPUPtr cpus;
int ncpus;
int s, c, t;
int id;
if (nodeGetInfo(&nodeinfo) < 0)
return -1;
ncpus = VIR_NODEINFO_MAXCPUS(nodeinfo);
if (VIR_ALLOC_N(cpus, ncpus) < 0)
return -1;
id = 0;
for (s = 0; s < nodeinfo.sockets; s++) {
for (c = 0; c < nodeinfo.cores; c++) {
for (t = 0; t < nodeinfo.threads; t++) {
cpus[id].id = id;
cpus[id].socket_id = s;
cpus[id].core_id = c;
if (!(cpus[id].siblings = virBitmapNew(ncpus)))
goto error;
ignore_value(virBitmapSetBit(cpus[id].siblings, id));
id++;
}
}
}
if (virCapabilitiesAddHostNUMACell(caps, 0,
ncpus,
nodeinfo.memory,
cpus) < 0)
goto error;
return 0;
error:
for (; id >= 0; id--)
virBitmapFree(cpus[id].siblings);
VIR_FREE(cpus);
return -1;
}
static int
nodeGetCellsFreeMemoryFake(unsigned long long *freeMems,
int startCell,
int maxCells ATTRIBUTE_UNUSED)
{
double avail = physmem_available();
if (startCell != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("start cell %d out of range (0-%d)"),
startCell, 0);
return -1;
}
freeMems[0] = (unsigned long long)avail;
if (!freeMems[0]) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Cannot determine free memory"));
return -1;
}
return 1;
}
static unsigned long long
nodeGetFreeMemoryFake(void)
{
double avail = physmem_available();
unsigned long long ret;
if (!(ret = (unsigned long long)avail)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Cannot determine free memory"));
return 0;
}
return ret;
}
/* returns 1 on success, 0 if the detection failed and -1 on hard error */
static int
virNodeCapsFillCPUInfo(int cpu_id ATTRIBUTE_UNUSED,
virCapsHostNUMACellCPUPtr cpu ATTRIBUTE_UNUSED)
{
#ifdef __linux__
int tmp;
cpu->id = cpu_id;
if ((tmp = virNodeGetCpuValue(SYSFS_CPU_PATH, cpu_id,
"topology/physical_package_id", -1)) < 0)
return 0;
cpu->socket_id = tmp;
if ((tmp = virNodeGetCpuValue(SYSFS_CPU_PATH, cpu_id,
"topology/core_id", -1)) < 0)
return 0;
cpu->core_id = tmp;
if (!(cpu->siblings = virNodeGetSiblingsList(SYSFS_CPU_PATH, cpu_id)))
return -1;
return 0;
#else
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("node cpu info not implemented on this platform"));
return -1;
#endif
}
int
nodeCapsInitNUMA(virCapsPtr caps)
{
int n;
unsigned long long memory;
virCapsHostNUMACellCPUPtr cpus = NULL;
virBitmapPtr cpumap = NULL;
int ret = -1;
int ncpus = 0;
int cpu;
bool topology_failed = false;
int max_node;
if (!virNumaIsAvailable())
return nodeCapsInitNUMAFake(caps);
if ((max_node = virNumaGetMaxNode()) < 0)
goto cleanup;
for (n = 0; n <= max_node; n++) {
size_t i;
if ((ncpus = virNumaGetNodeCPUs(n, &cpumap)) < 0) {
if (ncpus == -2)
continue;
goto cleanup;
}
if (VIR_ALLOC_N(cpus, ncpus) < 0)
goto cleanup;
cpu = 0;
for (i = 0; i < virBitmapSize(cpumap); i++) {
bool cpustate;
if (virBitmapGetBit(cpumap, i, &cpustate) < 0)
continue;
if (cpustate) {
if (virNodeCapsFillCPUInfo(i, cpus + cpu++) < 0) {
topology_failed = true;
virResetLastError();
}
}
}
/* Detect the amount of memory in the numa cell in KiB */
virNumaGetNodeMemory(n, &memory, NULL);
memory >>= 10;
if (virCapabilitiesAddHostNUMACell(caps, n, ncpus, memory, cpus) < 0)
goto cleanup;
cpus = NULL;
}
ret = 0;
cleanup:
if (topology_failed || ret < 0)
virCapabilitiesClearHostNUMACellCPUTopology(cpus, ncpus);
virBitmapFree(cpumap);
VIR_FREE(cpus);
if (ret < 0)
VIR_FREE(cpus);
return ret;
}
int
nodeGetCellsFreeMemory(unsigned long long *freeMems,
int startCell,
int maxCells)
{
unsigned long long mem;
int n, lastCell, numCells;
int ret = -1;
int maxCell;
if (!virNumaIsAvailable())
return nodeGetCellsFreeMemoryFake(freeMems,
startCell, maxCells);
if ((maxCell = virNumaGetMaxNode()) < 0)
return 0;
if (startCell > maxCell) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("start cell %d out of range (0-%d)"),
startCell, maxCell);
goto cleanup;
}
lastCell = startCell + maxCells - 1;
if (lastCell > maxCell)
lastCell = maxCell;
for (numCells = 0, n = startCell; n <= lastCell; n++) {
virNumaGetNodeMemory(n, NULL, &mem);
freeMems[numCells++] = mem;
}
ret = numCells;
cleanup:
return ret;
}
unsigned long long
nodeGetFreeMemory(void)
{
unsigned long long mem;
unsigned long long freeMem = 0;
int max_node;
int n;
if (!virNumaIsAvailable())
return nodeGetFreeMemoryFake();
if ((max_node = virNumaGetMaxNode()) < 0)
return 0;
for (n = 0; n <= max_node; n++) {
virNumaGetNodeMemory(n, NULL, &mem);
freeMem += mem;
}
return freeMem;
}
Reference in New Issue View Git Blame Copy Permalink